Heating-furnace.



E. SMITH & R. STEPHENSON. HEATING FURNACE.

APPLICATION FILED MAY 10,1912. I Patented Feb.4, 1913.

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HEATING FURNACE.

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Patented Feb. 4, 1913.

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E. SMITH & R. STEPHENSON.

HEATING FURNACE. APPLIOATIGN FILED MAY 10, 1912.

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E. SMITH & R. STEPHENSON.

HEATING FURNACE.

APPLTOATION FILED MAY 10,1912.

Patented Feb. 4, 1913.

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APPLICATION FILED MAY 10,1912.

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"IIEATING-FURNACE.

Specification of Letters Patent.

Patented Feb. 4, 1913.

7 Application filed May 10, 1912. Serial No. 696,431.

T all whom it may concern:

Be it known that we, ROBERT SMITH and ROBERT STEPHENSON, citizens of the United States, and both re -'ding at Indiana Harbor, in. the county of Lake and State of Indiana, have invented certain new and useful Improvements in Heating-Furnaces, of which the following is a specification.

This. invention relates to an improved more especially for and is of a continuous combitype, wherein the travel of the heated air and gases may be regulated as desired, together with reversible heating means for controlling and directing of the air and gases therethrough.

The essential object of the invention is to increase nace, wherein the air and gas chambers may utilize the waste heat and send the and steel,

. gas from the regenerating chambers to thefurnace at the same time-and through the same fiues contlnuously, whereby, when the furnace is reversed, t-heair and gas traveling through the hot checkers and flu es are.

regenerated, thus appreciably reducing the waste heat and minimizing fuel consumpvalve control.

tion.

Another object of the invention is to improve the furnace constructio-n generally,

including the reversible heating means and The invention further consists in the features of construction and combination of parts hereinafter' described and claimed.

A referred form of construction is illustrated in the drawings, wherein Figure 1 is a horizontal section taken through the'upper portion of-the heating furnace; Fi 2 is a vertical section taken on lin2-2 of Fig. 1, centrally thereof; F ig."3 fisa vertical section taken onv line 33 "of Fig. 1, through the combustion chamberar; Fig. 4 is a horizontal section taken Jo-nline 4-4 of-Fig. 2; Fig. 5 is a horizontal section taken on line 55, of F 2; Fig. 6-is a section taken on'1ine'66 of Fig. 1; Fig. 7 a vertical section taken' on line 7- of Fig. 1, through the air and gas regulating valves but on larger scale than Fig. 1 Fig. 8 is a verticalsection takenon line 8-8 of Fig. 1-, cent-rally of the respective air and gas regenerating chambers but on larger scale than Fig. 1;

wall 14. Therear end wall rality of longitudinal rails or the efficiency" of the heating fur- 7 spots,

Fig. 9 is a vertical section taken on line 99 of Fig. 1, through the gas box and gas chambers but on larger scale than Fig. 1; Fig. 10 is a vertical section taken on line 10-10 of Fig. 1, through the air inlet and airsupply chambers but on larger scale than Fig.1. v f

A preferred form of heating furnace. structure is shown comprising a furnace roof 12, opposite end walls 13, and a bottom has an upper opening 15 for permitting depositof iron and steel within said furnace upon a plupipes' 16, as in Fig. 1, which may extend the full width of the main part. of the furnace chamber and said rails or pipes 16 which carry the, H

steel, instead of being straight may be bent as at 17, preferably about ten feet from the discharge end, in order that the steelor iron when it drops out of the furnace ready for the rolling operation will not show cold which is important inthis kind of work. These rails or pipes are shown resting upon a series of transverse supporting members 18, substantially U-shaped in cross section asindicated in Fig. 3; and if desired certain 615* these members may be water cooled as in Fig. 2, supporting members 19 are thus shown.

An inclined runway 20 is provided toward the forward end thereof, for enabling the heated iron or steel to be discharged to a table 21 preparatory to the rolling operation.

Referring to Fig. 1, a stack foundation 31 and a stack 32 are shown intermediate gassupply chambers 33, 34, and air supply chambers 35, .36; and intermediate said gas supply chambers is a central gas flue 37 in communication with thest-ack opening 32 provided with a regulating damper 38. Toward the other sideof the chimney, an air flue 39 is shown communicating with a stack opening controllable ulating damper 40. A seriesof flues are provided communicating with the respective air and ture opening into a gas regenerating cham-. ber 42. flue 43 isshown leading from the. other gas chamber 34 in like manner to a.

gas regenerating chamber 44, andthe travel of the-gases through said flues or passages-110 wherein the two forward by an intervening reg- 0 gaschambers, wherein a flue 41 is shown leading from the gas chamber 33 extending, downwardly and across the strucmay be controlled. by any suitable valve mechanism.

In Fig. 9, one form of controlling device is shown, wherein a gas box t5, having a 'forth within a threaded bearing 53 for moving a valve cord 51-. The travel of the admitted gas within the valve chamber 51 is controlled preferably by a Forter valve 55, comprising a curved valve body 56, actuated by companion levers 57 acting in parallelism for a purpose hereinafter explained.

The air flues and 36, together with the intermediate air stack chamber 39, may be controlled by any suitable means, and a preferred form thereof is shown in Fig. 10, wherein is an upper valve chamber 58 having an inlet projecting valve seat 59 adapted to receive a valve cap 60 adjustable by a valve cord 61 traveling on asheave 62 journaled in an arched supporting frame (33. Adjacent to the intake opening and in the intermediate passage 39 are shouldered valve seats (r-l for engaging a butterfly valve '65 controllable in any suitable manner for regulating the flow of admitted fresh air into the respective chambers. The air supply chamber opens into an air duct 66 terminating in an air regenerating chamber 67, and the air supply chamber'36 opens into an air duct 68 terminating in an air regenerating chamber 69. Furthermore, the respective gas and air regenerating chambers, 42, 41, 67, and 69, may be built up with interior checker-work 70, preferably as shown in Fig. 8.

Referring to Figs. 1 and 7, a valve'box 71 is formed ad acent to the air regenerating chamber 67 and in communication therewith by a passage 72, and said valve box is shown as having two controlling valves 7 3 and 7a. A valve box 75 is likewise shown adjacent to and communicating with the air regenerating chamber 9 by means of a passage 7 G, and said valve box 75 is shown with valves 77 and 78. Likewise a valve box 79 is shown adjacent to and communicating with the gas regenerating chamber 4:4, by a passage 80, and said valve box 79 has valves 81 and 82. Again, thegas regenerating chamber 42 communicates with a valve box 83 by means of an intermediate passage 8%, and said valve box has controlling valves 85 and 86.

As shown in Fig. 2, a downcomer 87 is formed adjacent to the rear furnace end wall, opening at its upper end into the fur centrally of the furnace base, and terminating at the extreme it'mrward end of the furnace into opposite transverse ducts or lines 89 and 90, as in Fig. 5, which are in communication with the 11 p elive valve boxes ll, 75, 79, and 83, for permitting the (11131- bustion gases to be admitted into the spective air and gas regenerating chainbc as desired, during the operation of the heating furnace. The valve 7t controls the ad.- mission of the combustion gases through th flue or duct- 89, within the valve box t1, through the interl nediatc passage 72 into the air regenerating chamber (57, as does alsd the valve 78 for controlling the admission and flow of con ibustion through the valve box 75, thence through thepassagc To into the air regenerating chamber (39. Liliewise the admission of the combustion gases into the gas regenerating chambers is controlled by the valve 81for determining the flow of combustion gas through the valve box 79, and thence through the intermediate passage into the gas regenerating chamber 4 1. Also, the valve controls the admission of the combustion gases up through the floor duct 90 into the valve box 83, thence through theintermediate passage 8&- into the gas regenerating chamber 4:2.

As shown particularly in Figs. 1, 4t and 7 companion outer discharging fines or ducts 9'1 and 92 are formed adjacent to the discharge openings from the respective valve boxes. As shown in Fig. 7, in the valve box 71 the controlling valve 73' opens and vclosescommunication with a discharge duct 93, opening into the fine 92, and as shown in Figs. l and 4f the valve 77 in the valve box 75 likewise controls the fluid discharge from the valve box through the duct 9 t.

The valve 82 in the valve box 79 determinesthe fluid travel therefrom through a duct 95 opening into the flue 91; and the valve 86 in the valve box 83 determines the fluid control therefrom through the discharge duct 96 opening into the line 91. The gas discharging fine 91 is shown extending across a combustion chamber 97, as does also the adjacent air discharging line 92-, (Figs. 2

and 1) whereby maximum heat combustion is produced therein.

In use and operation, the fresh air being admitted into the air chamber 35 will travel through the fine (36 into the air regenerating chamber 67, thence up through the checkerwork 70 and over the passage 72 t0 the valve box 71, and then down through the opened valve 73 to the air discharging flue 92 to the combustion furnace chamber 97 .when the regulation of the butterfly valve is'as shown in Fig. 10. Obviously, a reversal of said butterfly valve 65 will cause the admitted fresh air to travel through the air chamber 36 instead of 35, so that the admitted fresh air will pass through the flue 68 instead of the fine 66 into the air regenerating chamber 69,t-hence upwardly through the checker work 70 and over the passage 76 to the valve box 75, and down through the valve 77 to the air discharging fine 92 into the furnace combustion chamber 97 \Vhen the gas controlling valve 55 is in the position shown in Fig. 9, forpermitting the gas to flow into the chamber 33 through the flue 41,t0 the regenerating chamber 42, it will pass upwardly through the checker work 70 over the passage 84, to the valve box 83, and, down through the valve 86, through the flue 91, thence to the furnace combustion chamber 97 ,and thence through the furnace to the down-comer 87 through the waste heat flue 88 to the front of the device into the branch flue 90, and upwardly through the open valve 81, through the valve box 79, over the passage 80, and down through the gas regenerating chamber 44, through the checkers 70, and thence discharging into I the exhaust flue 43.0ut through the gas up:

trolling take '34, through the downtake passage 37 to the stack 32. By. reversing the gas convalve 55 so as to initially admit the gas into the intake chamber 34 instead of 33, as in Fig. 9, the flow and travel of the gas is entirely reversed, the gas finally discharging through the uptake chamber 33 instead of 34, and down through the stack duct or.

flue 37. Thus, it m'ay be desirable to admit the gas'and air throughthe-intake chambers 34 and 36 respectively, whereby the flues 43 and 68 will take the gas and'air through the regenerating chambers '44 and 69, out through the checkers. 70, ve'rvthe passa cs 80 and'76, into the-valve, boxes 79 and 7 the valves 82 and 77 beingopened for passing gas, and air through the flues 91 and 92 simultaneously to the furnace.

The valves-78 and 81 are closed, at-which time the valves 85 and 74 are opened for enabling the Waste heat to pass from the downcomer 87 through the central flue 88 through said valves into the valve boxes 71 and 83, whereby the combustion. gases are carried into the regenerating chambers 42 and 67 and down through the interior checker-work 70, discharging therefrom into the exhaust flues 41 and 66, out through the gas uptake 33 and air uptake 35 into the discharging stack flues 37 and 39, to the stack and out. When the position of the air andgascontrollin valves is correspond lngly reversed, and the initial gas and an" intake is made through the ducts 41- and 66 into the initial gas and air regenerating chambers 42 and 67, the valves 73 and 86 are opened, for simultaneously permitting the travel and discharge into the flues 91 and 92, and thence to thefurnacej The valves 81 and 78 are opened for permitting the waste heatiand gases traveling from the furnace through the downcomer 87 to the Zing from the central fine 88 to pass into the valve boxes '75 and 79 through the passages 76 and 80 into the regenerating chambers 69 and 44,

and thence downwardly through the checker-work -70, discharging through the exhaust flues 68'and 43, into the respective gas and air, 'uptakes' 34 andrg36, thence out through the discharging chambers 37 and 39 through-the flue to the stack. 1

By the gas and air Working continuously from the regenerating chambersto the furnace, through the flues 91,-and92, consid-" 'erable saving in heat generation and fuel consumption is effected, since simultaneous.

continuous discharge is effected through" said flues from the respective generating chambers into the furnace, which keep said flues constantly hot,- causing-a much better draft and travel of said and more uniform heated gas and airjto the furnace for producing maximum; combustion. Moreover, by continuously carrying the Waste combustion gases through the ,downcomer 87 and ing the heated air and gases from the regenerating chambers: to a furnace conibustion chambeiga downcomer leading from the furnace merging into aslongitudinal waste heat flue, means for controlling the'admission' of heated combustion gasesfrom said' longitudinal flue to the respective regenerat-ing chambers, means for cont-rolling. the travel of the heated air and" gases from the regenerating chambers to the combustion chamber, means for controlling the admission of air through the air inlets and discharge therefrom, and means for, controlling the admission of gas through the gas inlets and discharge therefrom, substantially as described.

2. In a heating furnace, companion air:

inlet vchambers and companion gas inlet chambers, the'air inlet chambers having an intermediate discharge flue opening into a stack, and the companion gas inlet chambers having an intermediate gas discharge flue gas discharging flue inter several air and gas inlets to 7 said regenerating chambers, flues for carryopening into said'stack, means for controlling the admission of air to the respectiveiair inlets and discharge therefrom, means for controlling the admission of gas to the respective gas inlets and dischargetherefrom, a plurality ofjair and gasregenerators, a series offlues leading from the respective air and inlets to the several regenerating chambers, lines adjacent to and comnninicating with the regenerating chambers leznling to a furnace comlinistion chamher, a d owncomer merging into a waste heat tluoextending longitudinally and communirating with the regenerating chambers,

valves for controlling the flow of combustion gases from the longitudinal flue to the respective regenerating chambers, and valves for controlling the travel of the heated'air and gases from the regenerating chambers through exhaust flues, each of which has ducts communicating with the regenerating chambers, whereby when air and gasv are initially admit-ted through one of the air inlets and one of the gas inlets, a continuous circuit is effected for discharging through the stack, substantially described.

ln a heating furnace, air and gas inlet chambers, air-regenerating chamber'i, gas regenerating chambers, fines connnunicating with. said air and gas inlets and regenerating chambers, companion lines communicating with the regenerating chambers for carheat flue to the several regenerating chambers, means for controlling the discharge fromthe regenerating chambers into the fines leading to the combustion chamber, means for init ally admitting and discharglng air and gas to and from certaln of the regenerating chambers, and means for determining the exhaust of air and gases from the furnace to the stack, substantially as described.

4. In a heating furnace, air and gas inlet chambers, air and gas regenerating chambers, flues adjacent to and communicating with said regenerating chambers leading to a furnace combustion chamber, valves for controlling the discharge of heatedair and gases from said regenerating chambers to said fines, whereby a continuous discharge will be effected through said fines to the combustion chamber, in combination with a downcomer leading from the furnace merging into a waste heat fine for carrying the combustion gases from the furnace to the re-- spective regenerating chambers, valves for controlling the admission of said gases into the regenerating chambers, fines from said air and gas inlets to the several regenerating chambers, and means for regulating the initial admlsslon of alr and gas with-1n the respective inlets and discharging therefrom through. ducts to the stack, substantially as described.

5. In a heating furnace, air and gas inlet chambers, air and gas regenerating chamhers, lines from the air and gas inlets to the several regenerating chambers, companion fines for carrying the heated air and gas from the regenerating chambers to the combustion chamber, whereby a continuous discharge'of heated air and gases is effected from the regenerating chambers through said fines to the combustion chamber, valves for eacl of the regenerating chambers for controlli g the discharge of heated air and gases therefrom to .the fines communicating with the combustion chamber, a do-wncomer leading from the furnace and merging into an elongated waste heat flue, whereby the combustion gases may be carried from the furnace to the respective regenerating chambers, valves for controlling the admission of combustion gases from said waste heat flue into the regenerating chambers, and means for determining the admission and discharge of air and gases to and from said air and gas inlet-s into the air and gas fines opening to the stack, substantially as described.

6. In a heating furnace, companion air inlet chambers, companion gas inlet chambers, a stack intermediate said chambers, air and gas fines intermediate the air and gas inlet chambers opening into the stack, an air valve for determining the initial admission of air to one of the inlets and permitting discharge from the other air inlet into theintermediate stackflue, a gas valve for detern'iining the initial admission of gas to one of the gas inlets, and permitting discharge from the other gas inlet into the intermediate stack fine, a plurality of air and regenerating chambers, a series of separate fines leading from the respective air and gas inletchambers into the regenerating chambers, means for conducting the heated air and gases from the regenerating cha1nhere to a furnace combustion chamber, and a downcomer leading from the furnace and merging into an elongated waste heat flue for carrying the waste furnace combustion gases to the respective regenerating chambers, each of the regenerating chambers having a valve for controlling the admission of heated gases from the waste heat flue into the regenerating chambers, and each of the regenerating chambers having another Valve for controlling the fluid discharge therefrom into the fines leading to the combustion chamber, substantially as described.

, 7. In aheating furnace, air inlet chamhers, an air line intermediate said air inlet chambers opening into a stack, gas inlet chambers, a gas discharging flue interme diate said gas inlets opening into said stack,

, a gas discharging and for'carrying the heated air and from the regenerating chambers to a furnace combast on chamber, a doWnco-mer leading from the furnace merging into an elongated waste heat flue, and valves for each regenerating chamber, one of said valves controlling the admission .of combustion gases from the elongated Waste heat flue to theregenerating chambers, and'the other valve controlling the discharge of heated air and gases from the regenerating chambers into the fines leading to the combustion chambers, Whereby when air and gas are initially admitted through the air and gas inlets a continuous ci'rcuit is effected for discharging through the stack, substantially as described.

8. Ina heating furnace, air inlet chambers,

an air flue intermediate said air inlet chambers opening into a stack, gas inlet chambers, flue intermediatesaid gas inlets opening into said stack, a plurality of air and gas regenerating chambers, a series of separate flu'es leading from the several air gas inlets tov the gas regenerating chambers, companion flues for carrying the heated air and gases from the regenerating chambers to a furnace combustion chamber, a downcomer leading from the furnace merging into an elongated Waste heat flue, valves for each regenerating chamber, one of said valves controlling the admission of combustion gases from the elongated Waste heat flue to the regenerating chambers, and the other valve controlling the discharge of heated air and gases from the regenerating chambers into the fiues leading to the com-- bust-ion chambers, an air valve for determining the initial admission of air to one of the inlets and permitting discharge from the other air inlet' into the intermediate stack flue, and ages valve for determining the initial admiss on of gas to one 'of the gas other inlets, and permitting discharge from the flue, whereby When air and gas are initially admitted through air and gas inlets a continuous circuit is eifected for discharging through the stack, substantially as described.

9. In aheating furnace, the combination of a heating chamber, a pair of air regenerating chambers, a pair of gas regenerating chambers, air flues leading from a common supply to the air regenerating chambers, gas

flues leading from a common supply to. the gas regenerating chambers, an air flue leading from the air chambers tov the heat-ing chamber, a gas flue leading from the gas regenerating chambers to the her, a flue leading from the heating chamber to all of theregenerating chambers, valves for reversing the flow of gas and air through the respective sets of regenerating chambers, and valves for reversing the flow of gas and air through the inlet fiues, substantially as described. f

10. In a heating furnace, the combination of a heating chamber, a pair of air regen: crating chambers, chambers, means for introducing air to either of the air regenerating chambers, means for introducing gas to either of the gas regenerating chambers, a common flue leading from both of ,the air regenerating chambers to the heating chamber, acommon flue leading from both of the gas regenerating chambers to the heating chamber, a com mon flue leading from the heating chamber to all. of the regenerating chambers, and means for determining which of the regenerating chambers are incommunicationvvith the flues leading to the heating chamber, substantially as described.

ROBT. SMITH. ROBERT STEPHENSON. Witnesses: L

WALKER BANNING, MARY R. FRosr.

gas inlet-into the intermediate stack heating cham a pair of gas regenerating 

